If the image formed by a lens for all position of the object placed in front of it is always virtual, erect and diminished, state the type of the lens. Draw a ray diagram in support of your answer. If the numerical value of focal length of such a lens is 20 cm find its power is new cartesian sign conventions.

If the image formed by a lens for all position of the object placed in

1.	If the image formed by a lens for all position of the object placed in front of it is always virtual, erect and diminished, state the type of the lens. Draw a ray diagram in support of your answer. If the numerical value of focal length of such a lens is 20 cm find its power is new cartesian sign conventions.
Answer» SOLUTION :DIVERGING lens/ concave lens Focal length = -20 CM (lens is concave hence F is - ve) Power=P `=1//f` `=100//-20cm` `=-5D`